1 Cancri information

1 Cancri
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Cancer
Right ascension	07h 56m 59.45262s
Declination	+15° 47′ 25.0019″
Apparent magnitude (V)	5.97
Characteristics
Spectral type	K3− III
B−V color index	1.285±0.007
Astrometry
Radial velocity (Rv)	+13.55±0.12 km/s
Proper motion (μ)	RA: −26.731 mas/yr ; Dec.: −42.7591 mas/yr
Parallax (π)	6.9810 ± 0.0694 mas
Distance	467 ± 5 ly ; (143 ± 1 pc)
Absolute magnitude (MV)	0.03
Details
Mass	1.1 M☉
Radius	18.7 R☉
Luminosity	199 L☉
Surface gravity (log g)	2.03 cgs
Temperature	4,231 K
Metallicity [Fe/H]	−0.01 dex
Other designations
	1 Cnc, BD+16°1590, FK5 1208, HD 64960, HIP 38848, HR 3095, SAO 97399
Database references
SIMBAD	data

1 Cancri is a single^[2] star in the zodiac constellation of Cancer, positioned near the border with Gemini at a distance of around 467 light years from the Sun. It is barely visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.97. The object is moving further from the Earth with a heliocentric radial velocity of +14 km/s.

This is an evolved giant star with a stellar classification of K3− III,^[3] having exhausted the hydrogen at its core and expanded. It is specified as a spectral standard for that type.^[3] The angular diameter of the star measured from a lunar occultation is 2.1±0.6 mas,^[9] which, at its estimated distance, equates to a physical radius of about 19 times the radius of the Sun. It is radiating 199 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,231 K.

^ ^a ^b ^c ^d ^e ^f ^g Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference perkins1989 was invoked but never defined (see the help page).
^ ^a ^b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
^ Cite error: The named reference starhorse was invoked but never defined (see the help page).
^ Cite error: The named reference ticv8 was invoked but never defined (see the help page).
^ ^a ^b ^c Cite error: The named reference apogee was invoked but never defined (see the help page).
^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
^ Cite error: The named reference Richichi2005 was invoked but never defined (see the help page).

[GaiaDR3-1] ^ ^a ^b ^c ^d ^e ^f ^g Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).

[Eggleton2008-2] Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).

[perkins1989-3] Cite error: The named reference perkins1989 was invoked but never defined (see the help page).

[Anderson2012-4] Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).

[starhorse-5] Cite error: The named reference starhorse was invoked but never defined (see the help page).

[ticv8-6] Cite error: The named reference ticv8 was invoked but never defined (see the help page).

[apogee-7] Cite error: The named reference apogee was invoked but never defined (see the help page).

[SIMBAD-8] Cite error: The named reference SIMBAD was invoked but never defined (see the help page).

[Richichi2005-9] Cite error: The named reference Richichi2005 was invoked but never defined (see the help page).

Observation data Epoch J2000.0 Equinox J2000.0
Constellation	Cancer
Right ascension	07^h 56^m 59.45262^s^[1]
Declination	+15° 47′ 25.0019″^[1]
Apparent magnitude (V)	5.97^[2]
Characteristics
Spectral type	K3− III^[3]
B−V color index	1.285±0.007^[4]
Astrometry

Radial velocity (R_v)	+13.55±0.12^[1] km/s
Proper motion (μ)	RA: −26.731^[1] mas/yr Dec.: −42.7591^[1] mas/yr
Parallax (π)	6.9810 ± 0.0694 mas^[1]
Distance	467 ± 5 ly (143 ± 1 pc)
Absolute magnitude (M_V)	0.03^[4]

Details

Mass	1.1^[5] `M`_☉
Radius	18.7^[6] `R`_☉
Luminosity	199^[1] `L`_☉
Surface gravity (log g)	2.03^[7] cgs
Temperature	4,231^[7] K
Metallicity [Fe/H]	−0.01^[7] dex

Other designations
1 Cnc, BD+16°1590, FK5 1208, HD 64960, HIP 38848, HR 3095, SAO 97399^[8]
Database references
SIMBAD	data

1 Cancri information

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